1) Is there a way to make the battles bigger than just 16 people, like can you make it 50 people with reinforcements of 450? Is there a way to increase the points for space battles?

Yep

2) Is there a way to make it so space battle treat the two command points (one on each ship) as Command centers that can be captured

Yep

3) Can ai control heroes and is there a way to make more than one hero in a battle at once (I.E. Have Han Solo, Chewie, and Luke for the rebels, and have Darth Vader, the Emperor, and Boba Fett for the imperials)?

For the first three, how? I mean, could you give me a bit of detail and for 4 yeah you got what i meant i want several more models for heroes so i can have several more heroes including ben kanobi, since it makes no sense to have obi one be in rebels heroes since its ben who is the older obi one